# 7983 — Fastener standard equivalences: DIN to ISO / EN crossover

For 7983, fastener description is Raised countersunk (oval) head; tapping screws with cross recess; iso equivalent is 7051; interchangeability is Head dimensions and countersunk angles changed; modification notes is Head dimensions and countersunk angles changed, verified against its source on 2026-08-12.

- **DIN standard:** 7983 _(verified: appears in the quote below)_
- **Fastener description:** Raised countersunk (oval) head; tapping screws with cross recess _(verified: appears in the quote below)_
- **ISO equivalent:** 7051 _(verified: appears in the quote below)_
- **Interchangeability:** Head dimensions and countersunk angles changed _(verified: appears in the quote below)_
- **Modification notes:** Head dimensions and countersunk angles changed _(verified: appears in the quote below)_

## What the source says

> Raised countersunk (oval) head; tapping screws with cross recess | 7983 | | | 7051 | 7051 | 1990-08 | Cross recessed raised countersunk (oval) head tapping screws | Head dimensions and countersunk angles changed |

## Sources disagree

More than one authority states this, and they do not state the same
thing. Both are reproduced with the source each came from.

### Fastener description

fullerfasteners.com says fastener description is **Raised countersunk (oval) head; tapping screws with cross recess**, as of 2026-08-12.

> Raised countersunk (oval) head; tapping screws with cross recess | 7983 | | | 7051 | 7051 | 1990-08 | Cross recessed raised countersunk (oval) head tapping screws | Head dimensions and countersunk angles changed |

Source: https://fullerfasteners.com/tech/din-iso-en-crossover-chart/

monsterbolts.com says fastener description is **Raised profile tolerance.**, as of 2026-08-12.

> DIN 7983 | ISO 7051 | Check spec

Source: https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners

trfastenings.com says fastener description is **Countersunk (flat) Head Tapping Screws with cross recess**, as of 2026-08-12.

> DIN 7983 | ISO 7051 | | Countersunk (flat) Head Tapping Screws with cross recess |

Source: https://www.trfastenings.com/knowledge-base/engineering-data/fastener-standards


### Interchangeability

fullerfasteners.com says interchangeability is **Head dimensions and countersunk angles changed**, as of 2026-08-12.

> Raised countersunk (oval) head; tapping screws with cross recess | 7983 | | | 7051 | 7051 | 1990-08 | Cross recessed raised countersunk (oval) head tapping screws | Head dimensions and countersunk angles changed |

Source: https://fullerfasteners.com/tech/din-iso-en-crossover-chart/

monsterbolts.com says interchangeability is **Check spec**, as of 2026-08-12.

> DIN 7983 | ISO 7051 | Check spec

Source: https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners


## Source

- https://fullerfasteners.com/tech/din-iso-en-crossover-chart/
- https://monsterbolts.com/pages/common-din-numbers-for-metric-fasteners
- https://www.trfastenings.com/knowledge-base/engineering-data/fastener-standards

Last verified: 2026-08-12. Review by: 2028-08-11.
Part of [Fastener standard equivalences: DIN to ISO / EN crossover](https://referencesource.org/fastener-thread-standard-equivalence/).